Malicious PDF — malware analysis report

Static analysis result for SHA-256 209ec2e255b7e7f4…

MALICIOUS

PDF

89.1 KB Created: 2021-09-07 17:33:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df061abc4578ec4d3aacf95828d06529 SHA-1: a4ee1951e1257a71143534f037282ef037b42dfc SHA-256: 209ec2e255b7e7f4481344e0d5078ebe8e367507884074f443a6c4c6285d3838
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://allytemp.ru/uplcv?utm_term=under+the+banner+heaven+pdf
    • https://ruxthai.com/ckfinder/userfiles/files/timokafozizu.pdf
    • https://lawrenceyezersky.com/userfiles/file/7412646802.pdf
    • http://ankurgroups.com/userfiles/file/62300600481.pdf
    • http://watthaistuttgart.de/userfiles/file/gugulodafavolefimaluran.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/dgt48kffp4h5t96u64g9d9elcm/87917592938.pdf
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/ihboqljn3troeneq206seddrsn/5764527108.pdf
    • http://mrsjamesirvine.com/clients/82887/File/87721890856.pdf
    • http://hc6999.com/userfiles/files/33554964619.pdf
    • http://lamachine.nl/userfiles/file/13564115625.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/73cpi10tqtjdlma3isiqsvtrcs/tonibazologenomo.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd73ad4705---lufalejosuwewol.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a76d81e9af1---kurewezimakuweravezuz.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3809ceb21---492905751.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/431d5a8cf6fe54b7cb102373da78f3b1/botezatinupatixapuguget.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087febd0b2b6---rafolegipuxeza.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/q9senj8rmq1j35k51lmsaeqnpl/foxezuwazusaxo.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/jif1mdsbgn1sklsldsi32jgprr/67131242186.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d4d659933---78518958709.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/6e0f8b2f41a8105cd9298918d95151ca/ripejoteru.pdf
    • http://bookblog.kr/data/file//files/wubidosoken.pdf
    • http://asijskepotraviny.cz/files/file/nasekofinokigasepowevon.pdf
    • http://maivietnamesecotati.com/uploads/files/84563793285.pdf
    • https://dalton-english.com/userfiles/file/47562736525.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/kc8fhhi8tcds14k56ppqubv7s1/2548704953.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ff.bin
ebdc8d131da499c2cd3e8a07461019dd94e3c52a66abea3b3c87e95800b62fa7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FF 10384 bytes
font_01_sfnt_off00010c24.bin
d20b3746589cd859d497a488afae54e4bdf9356c8b7b0063f2c371661e18df9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C24 19196 bytes
font_02_sfnt_off00013e66.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E66 16792 bytes